I checked the contents of modules_2.1.23-1.deb and found that the lsmod, insmod, modprobe, etc. are missing from the file. Did the maintainer forget to include those program files?
drwxr-xr-x root/root 0 Feb 26 10:22 1997 ./ drwxr-xr-x root/root 0 Feb 26 10:22 1997 etc/ -rw-r--r-- root/root 404 Feb 26 10:22 1997 etc/modules -rw-r--r-- root/root 1610 Feb 26 10:22 1997 etc/conf.modules drwxr-xr-x root/root 0 Feb 26 10:22 1997 etc/init.d/ -rwxr-xr-x root/root 1131 Feb 26 10:22 1997 etc/init.d/modutils -rwxr-xr-x root/root 696 Feb 26 10:22 1997 etc/init.d/kerneld drwxr-xr-x root/root 0 Feb 26 10:22 1997 sbin/ drwxr-xr-x root/root 0 Feb 26 10:22 1997 usr/ drwxr-xr-x root/root 0 Feb 26 10:22 1997 usr/man/ drwxr-xr-x root/root 0 Feb 26 10:22 1997 usr/man/man1/